In Lord of the Flies what does the naval officer see Jack as?

At the very end of the book, after Jack had accidentally set fire to the entire island in an attempt to hunt down and kill Ralph, Ralph staggered on to the beach pursued by the hunters and came face to face with a naval officer. A naval cutter and crew were hauled up on the beach. The officer asked what was going on and told Ralph that, "We saw your smoke." So the book ironically ended with the rescue of the remaining boys by a naval vessel which had been attracted by the same fire which had been lit in an attempt to kill one of those same boys.